These are hard Shell Crayfish and soft Shell CrayFish....They are very small....Mustad 3366 #6....A Bass or trout can come in and In-hail Several of these at a time.....This is a Deadly Fly....There is a Secret to this fly...The chest is loaded with foam which causes the pincers to Flash in the fishes face....Provoking a Strike.........Deadly....

But, I don't completely understand your point about the foam and the pincer action(?)

Good color combinations.

Pocono

Hi Pocono this is FlySlinger The Craw has a small Brass Dumbell in the back of the crawfish Which cause the Bug to travel Backwards like a normal Crayfish with the hook point up....the thorax is loaded with Foam which causes the pincers to flash up at a bass like a normal craw protecting it self like a normal craw from a Bass.....Tail Down pincers up this is a very Deadly lure.....And this is a very effective and Difficult Pattern....and small item 3366 #6 size hook